Unmanned aerial vehicles

ABSTRACT

A UAV comprises a camera arrangement configurable such that a field of view of the camera arrangement includes airspace directly above the UAV, a lighting arrangement configurable in an upwards-facing configuration, and a controller operable to cause the lighting arrangement to illuminate an object in the airspace directly above the UAV.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. § 119(a) to UK PatentApplication Nos. GB1721352.1, filed on Dec. 19, 2017 and GB1802100.6,filed on Feb. 8, 2018. The entire content of each of these patentapplications is hereby incorporated by reference.

This application is a continuation of U.S. patent application Ser. No.16/112,808, filed Aug. 27, 2018, which is incorporated by reference inits entirety.

FIELD

This disclosure relates to unmanned aerial vehicles (UAVs).

BACKGROUND

A UAV, which may be known as a ‘drone’ or an ‘unmanned aircraft system(UAS)’, is an aircraft that does not have a human pilot aboard. Someknown UAVs have a camera that can capture an image of a scene within thefield of view of the camera. The usability of such images, by the UAV orotherwise, can be negatively impacted by various factors.

BRIEF DESCRIPTION OF FIGURES

Various features will now be described, by way of example only, withreference to the accompanying drawings in which:

FIG. 1 shows a block diagram of an example UAV in accordance withembodiments.

DETAILED DESCRIPTION

In examples described herein, a UAV can illuminate the airspace directlyabove the UAV to provide an improved image of a scene including theairspace, whether for use by the UAV or otherwise, compared to an imageof the scene in which the illumination is not provided. This isespecially effective when the UAV performs an autonomous take-off andwhere there is an object in the airspace above the UAV, but is alsoeffective in other scenarios. For example, this can be effective ininfrastructure inspection, where the inspection is performed by the UAVand/or a human inspector. The features described herein areparticularly, but not exclusively, effective in low-light and/or poorweather conditions.

Referring to FIG. 1, there is shown an example of a UAV 100. The UAV 100may be a rotocopter. Examples of rotocopters are quadcopters andhexacopters.

The UAV 100 comprises a controller 110. The controller 110 controls theUAV 100. The controller 110 comprises one or more components. The one ormore components may be implemented in hardware and/or software. Thecontroller 110 may be arranged to execute computer-readable instructionscomprised in a computer program and, thus, to cause the techniquesdescribed herein to be performed.

The UAV 100 comprises a camera arrangement 120. The camera arrangement120 may be communicatively coupled to the controller 110. The cameraarrangement 120 captures image data. The image data may comprise stillimage data and/or video data. The camera arrangement 120 may capturevisible light and/or infrared.

The camera arrangement 120 is configurable such that a field of view ofthe camera arrangement 120 includes airspace directly above the UAV 100.As such, the camera arrangement 120 can capture image data representinga scene including an object in the airspace directly above the UAV 100.Such an object may represent a potential collision risk for the UAV 100,particularly, but not exclusively, when the UAV 100 performs a verticaltake-off, either autonomously or under the control of a human operator.

In some examples, the camera arrangement 120 has a fixed orientation. Assuch, the field of view of the camera arrangement 120 may permanentlyinclude the airspace directly above the UAV 100.

In other examples, the camera arrangement 120 has a dynamic orientation.As such, the field of view of the camera arrangement 120 may temporarilyinclude the airspace directly above the UAV 100 and other airspace.

A fixed-orientation camera arrangement 120 may result in the UAV 100having a relatively low manufacturing effort, a relatively low weight, arelatively low maintenance effort and/or a relatively high mechanicalreliability compared to a dynamic-orientation camera arrangement 120.However, a dynamic-orientation camera arrangement 120 may result in theUAV 100 having a relatively large field of view and/or relatively fewcameras compared to a fixed-orientation camera arrangement 120.

Where the camera arrangement 120 has a dynamic orientation, thecontroller 110 may be operable to adjust the orientation of the cameraarrangement 120. This can provide more flexibility than afixed-orientation camera arrangement 120.

Where the camera arrangement 120 has a dynamic orientation, theorientation of the camera arrangement 120 may be adjustable by hand. Forexample, a human operator of the UAV 100 may be able to select a desiredorientation of the camera arrangement 120 pre-flight.

Where the camera arrangement 120 has a dynamic orientation, thecontroller 110 may be operable to adjust the orientation of the cameraarrangement 120 in-flight. This can provide more flexibility than adynamic camera arrangement 120 if the dynamic camera arrangement 120cannot be adjusted in-flight. For example, a hand-adjustable dynamiccamera arrangement may not be adjustable in-flight and may only beadjustable on the ground. The controller 110 may be operable to adjustthe orientation of the camera arrangement 120 to track an object.

The camera arrangement 120 may comprise a single camera or may comprisemultiple cameras. Multiple cameras may operate as a stereo pair.Multiple cameras may provide a larger field of view than the field ofview of a single camera. Multiple cameras may enable electromagneticradiation from different parts of the spectrum to be captured. Forexample, multiple cameras may enable both visible light and infrared tobe captured.

The UAV 100 comprises a lighting arrangement 130. The lightingarrangement 130 emits electromagnetic radiation. The emittedelectromagnetic radiation may be visible light and/or infrared.

The lighting arrangement 130 may be outside the field of view of thecamera arrangement 120. As such, enhanced performance may be provided bythe lighting arrangement 130 as described herein, without the lightingarrangement 130 interrupting the field of view of the camera arrangement120.

The lighting arrangement 130 may, alternatively, be within the field ofview of the camera arrangement 120. This may provide a more compact UAV100 depending on the nature of, for example, the camera arrangement 120and/or the lighting arrangement 130.

In some examples, the lighting arrangement 130 has a fixed orientation.

In other examples, the lighting arrangement 130 has a dynamicorientation.

A fixed-orientation lighting arrangement 130 may result in the UAV 100having a relatively low manufacturing effort, a relatively low weight, arelatively low maintenance effort and/or a relatively high mechanicalreliability compared to a dynamic-orientation lighting arrangement 130.However, a dynamic-orientation lighting arrangement 130 may result inthe UAV 100 being able to illuminate a relatively large area and/or haverelatively few light sources compared to a fixed-orientation lightingarrangement 130.

Where the lighting arrangement 130 has a dynamic orientation, thecontroller 110 may be operable to adjust the orientation of the lightingarrangement 130. This can provide more flexibility than afixed-orientation lighting arrangement 130. The controller 110 may beoperable to adjust the orientation of the lighting arrangement 130 totrack an object.

Where the lighting arrangement 130 has a dynamic orientation, theorientation of the lighting arrangement 130 may be adjustable by hand.For example, a human operator of the UAV 100 may be able to select adesired orientation of the lighting arrangement 130 pre-flight.

Where the lighting arrangement 130 has a dynamic orientation, thecontroller 110 may be operable to adjust the orientation of the lightingarrangement 130 in-flight. This can provide more flexibility than afixed lighting arrangement 130 that cannot be adjusted in-flight. Forexample, a hand-adjustable lighting arrangement 130 may not beadjustable in-flight and may only be adjustable on the ground.

The lighting arrangement 130 may comprise a single light source ormultiple light sources. Multiple lights sources may emit electromagneticradiation at different frequencies. An example of a light source is alight-emitting diode, LED.

The lighting arrangement 130 may be powered by a power source of the UAV100 that also powers a motor of the UAV 100. As such, a common powersource can be used for both the lighting arrangement 130 and the motor.Charging of the power source may be facilitated in such situations. Amore compact UAV 100 may be provided compared to having separate powersources for the motor and the lighting arrangement 130 particularly, butnot exclusively, where the lighting arrangement 130 comprises multiplelight sources.

The controller 110 is operable to cause the lighting arrangement 130 toilluminate an object in the airspace directly above the UAV 100. Assuch, a clearer view of the object may be possible. This may beparticularly effective in low-light and/or poor weather conditions.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object based on image data received from the cameraarrangement 120. For example, the controller 110 may cause the lightingarrangement 130 to illuminate the object in response to recognising theobject in the image data received from the camera arrangement 120. Thecontroller 110 may cause the lighting arrangement 130 to illuminate theobject in response to recognising the object in the image data receivedfrom the camera arrangement 120 as an object having a predeterminedproperty. The controller 110 may cause the lighting arrangement 130 notto illuminate the object in response to recognising the object in theimage data received from the camera arrangement 120 as an object havinga predetermined property. Examples of such predetermined propertiesinclude, but are not limited to, type, size and shape. For example, thecontroller 110 may cause the lighting arrangement 130 not to illuminateaircraft.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object in response to the object being in the field ofview of the camera arrangement 120. The controller 110 may be able todetermine that the object is in the field of view of the cameraarrangement 120 based on image data received from the camera arrangement120.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object in response to the object being less than athreshold distance from the UAV 100. The controller 110 may be able todetermine that the object is less than a threshold distance from the UAV100 based on image data received from the camera arrangement 120. Assuch, objects that present a potential collision risk based on theirdistance from the UAV 100 may be illumined so that more accurate imagedata representing them may be captured. This may be especially effectivein low-light and/or poor weather conditions. The controller 110 may beoperable to cause the lighting arrangement 130 not to illuminate theobject in response to the object being more than the threshold distancefrom the UAV 100.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object in response to detecting a collision risk withthe object. The controller 110 may be able to detect a collision riskwith the object based on image data received from the camera arrangement120. As such, objects that present a potential collision risk based ontheir distance from the UAV 100 may be illumined so that more accurateimage data representing them may be captured.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object during a vertical take-off. The verticaltake-off may be an autonomous vertical take-off. There is a particularrisk of collision with an object above the UAV 100 during verticaltake-off. Illuminating such an object when the UAV 100 is controlled bya human operator is effective, since it increases the likelihood of thehuman operator being able to see the object and take corrective action.Illuminating such an object when the UAV 100 operators autonomously isespecially effective, however, as the UAV 100 has a lower chance ofcollision with the object if the object can more clearly be detected bythe UAV 100.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object in anticipation of a vertical take-off. Forexample, the controller 110 may be operable to determine that verticaltake-off is to be initiated and the controller 110 may be operable tocause the lighting arrangement 130 to illuminate the object inanticipation of the vertical take-off that is to be initiated. This mayallow the UAV 100 to better survey its environment prior to verticaltake-off.

The controller 110 may be operable to cause the lighting arrangement 130to illuminate the object based on data received from the object. Thedata received from the object may comprise a request to illuminate theobject.

The controller 110 may be operable to control the lighting arrangement130 autonomously. In other words, the controller 110 may be operable tocontrol the lighting arrangement 130 without input from an entity otherthan the UAV. An example of such an entity is a human operator of theUAV 100.

The controller 110 may be operable to control the lighting arrangement130 based on data received from a control device of human operator ofthe UAV 100. The data received from the control device may comprise arequest to illuminate the object.

The controller 110 may be operable to control the lighting arrangement130 based on data received from an entity other than the human operatorof the UAV 100. The data may comprise a request to illuminate theobject. The entity other than the human operator may, for example, be anaviation authority, entity responsible for a restricted airspace etc.

The controller 110 may be operable to control the lighting arrangement130 based on location, time of day, day of week, manual command, batterylevel etc. For example, the controller 110 may be operable to controlthe lighting arrangement 130 to illuminate or not illuminate in one ormore predetermined locations, at one or more predetermined times of day,on one or more predetermined days of the week, in response to one ormore manual commands, in response to a battery level being above orbelow a battery level threshold.

The UAV 100 may comprise one or more different components (for examplemore, fewer and/or alternative) components than those depicted in FIG.1.

Various measures (for example UAVs, controllers and methods) areprovided in which a UAV comprises a camera arrangement configurable suchthat a field of view of the camera arrangement includes airspacedirectly above the UAV. The UAV comprises a lighting arrangementconfigurable in an upwards-facing configuration. The UAV comprises acontroller operable to cause the lighting arrangement to illuminate anobject in the airspace directly above the UAV. As such, a clearer viewof the object may be obtained, compared to a non-illuminated view.

The controller may be operable to cause the lighting arrangement toilluminate the object based on image data received from the cameraarrangement. As such, information relating to the object and/or airspacemay be factored into the illumination of the object.

The controller may be operable to cause the lighting arrangement toilluminate the object in response to the object being in the field ofview of the camera arrangement. An object being visible by the cameraarrangement is an indicator that the object presents a potentialcollision risk.

The controller may be operable to cause the lighting arrangement toilluminate the object in response to the object being less than athreshold distance from the UAV. A clearer impression of the object maybe obtained, compared to a non-illuminated impression, such that actionmay be taken in relation to a close object, for example to try to avoidcollision.

The controller may be operable to cause the lighting arrangement toilluminate the object in response to detecting a collision risk with theobject. A clearer impression of the object may be obtained, compared toa non-illuminated impression, such that action may be taken in relationto an object that presents a significant collision risk.

The controller may be operable to cause the lighting arrangement toilluminate the object in anticipation of vertical take-off. Byilluminating the object prior to vertical take-off, a greaterunderstanding of the environment surrounding the UAV can potentially beobtained than when the object is illuminated only during verticaltake-off. Vertical take-off could, for example, be aborted if the objectpresents a particularly significant collision risk.

The controller may be operable to cause the lighting arrangement toilluminate the object during vertical take-off. The lighting arrangementis effective for vertical take-offs where the risk of collision with anobject above the UAV may be higher than in other flight procedures.

The vertical take-off may be an autonomous vertical take-off. Thelighting arrangement is particularly effective for autonomous verticaltake-offs where the UAV itself provides collision with limited or nointervention from a human operator.

The controller may be operable to cause the lighting arrangement toilluminate the object based on data received from the object. The UAVcan use data communicated by an external entity to determine that theobject should be illuminated.

The controller may be operable to control the lighting arrangementautonomously. This may provide low-latency and/or proactive lighting.

The controller may be operable to control the lighting arrangement basedon data received from a control device of a human operator of the UAV.As such, a remote human operator can instruct the UAV to illuminate theobject. This may be especially effective where the human operator canperceive a risk that the UAV cannot or does not perceive.

The UAV may comprise a power source and a motor. The power source may bearranged to power the motor. The power source may be arranged to powerthe lighting arrangement. As such, a relatively compact and/orefficient-charging UAV may be provided.

The camera arrangement and/or the lighting arrangement may have a fixedorientation. This may provide a relatively uncomplicated and/orlow-effort-to-maintain UAV.

The camera arrangement and/or the lighting arrangement may have adynamic orientation. This may provide a relatively flexible UAV.

The controller may be operable to adjust the orientation of the cameraarrangement and/or the lighting arrangement. This is especiallyeffective where the UAV operates autonomously, such that the cameraarrangement and/or the lighting arrangement can be controlled with no orlimited human operator input.

The controller may be operable to adjust the orientation of the cameraarrangement and/or the lighting arrangement in-flight. This allowrelatively high in-flight flexibility compared, for example, to a UAV inwhich the orientation of the camera arrangement and/or the lightingarrangement can only be adjusted when the UAV is grounded.

Various measures (for example UAVs, controllers and methods) areprovided in which a UAV comprises a lighting arrangement. The UAVcomprises a controller operable to cause the lighting arrangement toilluminate airspace directly above the UAV in anticipation of and/orduring an autonomous vertical take-off performed by the UAV. As such,illumination may be provided at a particularly effective time where therisk of collision with an object above the UAV is relatively highlylikely and where human operator intervention may not be available.

Various measures (for example UAVs, controllers and methods) areprovided in which a UAV comprises an upwards-facing lighting arrangementcontrollable, while the UAV is in-flight, by a human operator of the UAVand/or autonomously by a controller comprised in the UAV. As such,control is provided to the human operator without the UAV having toreturn to the ground for the lighting to be controlled. Controlling thelighting arrangement may comprise causing the lighting arrangement toilluminate and/or not to illuminate.

Various measures (for example UAVs, controllers and methods) areprovided in which a UAV a lighting arrangement arranged to illuminate aninterior of the UAV and/or a camera arrangement configurable to have afield of view including an interior of the UAV. As such, an interior ofthe UAV may be more readily inspected. An interior-facing lightingarrangement may facilitate inspection even where a camera arrangement isnot provided, since a human inspector can more readily inspect theinterior of the UAV. An interior-facing camera arrangement mayfacilitate inspection even where a lighting arrangement is not provided,since a human inspector can remotely inspect the interior of the UAVand/or inspect the interior of the UAV without disassembling the UAV.The interior may be sufficiently illuminated without the additionallighting arrangement.

Various modifications and alternatives will be apparent to one skilledin the art.

Examples are described above in which the UAV 100 comprises a cameraarrangement 120. In further examples, the UAV 100 does not comprise thecamera arrangement 120.

Although the examples described above are especially effective where theUAV 100 comprises the camera arrangement 120 (so that improved imagesmay be obtained for use by the UAV 100 or otherwise), it may still beeffective to provide an illuminating effect above the UAV 100 even wherethe UAV 100 does not comprise the camera arrangement 120. For example,illumination above the UAV 100 may enable an object above the UAV 100 todetect the presence of the UAV 100 based on the illumination. The otherobject may, for example, be another UAV or otherwise.

Even where the UAV 100 comprises the camera arrangement 120, examplesare envisaged in which the camera arrangement 120 is not configurablesuch that a field of view of the camera arrangement 120 includesairspace directly above the UAV 100. For example, the camera arrangement120 may be configurable to have a field of view to one or more sides of,behind, and/or below the UAV 100.

Examples are described above in which the camera arrangement 120 has afield of view including an exterior of the UAV 100, namely above, to oneor more sides of and/or below the UAV 100. In further examples, thecamera arrangement 120 has a field of view including an interior of theUAV 100. The lighting arrangement 130 may illuminate the interior of theUAV 100 to enable the camera arrangement 120 to capture a useable imageof the interior of the UAV 100. Such an image may be used, for example,for fault reporting.

Examples are described above in which the lighting arrangement 130 isconfigurable in an upwards-facing configuration. In further examples,the lighting arrangement 130 is not configurable in an upwards-facingconfiguration. For example, the lighting arrangement 130 may beconfigurable to provide illumination in front of, to one or more sidesof, behind, and/or below the UAV 100.

The lighting arrangement 130 may be used to provide information relatedto operation of the UAV 100 to another entity. For example, where thelighting arrangement 130 is configurable to provide illumination behindthe UAV 100, the lighting arrangement 130 may emit red light to indicatethat the UAV 100 is breaking, a flashing amber light to indicate ahazard etc. Where the UAV 100 is associated with an emergency service,the UAV 100 may emit a flashing blue light when it is involved in anemergency operation.

Examples are described above in which the controller 110 is operable tocause the lighting arrangement 130 to illuminate an object in theairspace directly above the UAV 100. In further examples, the lightingarrangement 130 may be caused to illuminate an object in the airspacedirectly above the UAV 100 in another manner. For example, the lightingarrangement 130 may be controlled by hand to illuminate an object in theairspace directly above the UAV 100.

The lighting arrangement 130 may be turned on (in other words may becaused to illuminate) in response to a turn-on trigger. The lightingarrangement 130 may be turned off (in other words may be caused not toilluminate) in response to a turn-off trigger. Various turn-on andturn-off triggers are described above.

A further example is an ambient light level. For example, the lightingarrangement 130 may be turned on when the ambient light level dropsbelow a threshold ambient light level. The lighting arrangement 130 maybe turned off when the ambient light level rises above a thresholdambient light level.

A further example is a location of the UAV 100. For example, thelighting arrangement 130 may be turned on when the UAV 100 is or is notin a predetermined location. The lighting arrangement 130 may be turnedoff when the UAV 100 is or is not in a predetermined location.

A further example is a battery level of the UAV 100. For example, thelighting arrangement 130 may be turned on and/or may have the option ofbeing turned on only when the battery level of the UAV 100 is above athreshold battery level value. The lighting arrangement 130 may beturned off when the UAV 100 is below a threshold battery level value.

Examples are described in which the lighting arrangement 130 illuminatesor does not illuminate. In further examples, the lighting arrangement130 provides one or more further degrees of illumination between fulland no illumination.

The lighting arrangement 130 may be configured to convey information.For example, the lighting arrangement 130 may emit modulated light,where the modulated light carries modulated information to be conveyedto an observer of the emitted light.

The following numbered clauses on pages 11 to 13 of the presentdescription correspond to the claims of UK patent application nos.GB1721352.1 and GB1802100.6, from which the present application claimspriority, as filed. The claims of the present application as filed canbe found on the subsequent pages 14 to 16 of the specification whichbegin with the heading “CLAIMS”.

1. An unmanned aerial vehicle, UAV, comprising:

a camera arrangement configurable such that a field of view of thecamera arrangement includes airspace directly above the UAV;

a lighting arrangement configurable in an upwards-facing configuration;and

a controller operable to cause the lighting arrangement to illuminate anobject in the airspace directly above the UAV.

2. A UAV according to clause 1, wherein the controller is operable tocause the lighting arrangement to illuminate the object based on imagedata received from the camera arrangement.3. A UAV according to clause 1 or 2, wherein the controller is operableto cause the lighting arrangement to illuminate the object in responseto the object being in the field of view of the camera arrangement.4. A UAV according to any of clauses 1 to 3, wherein the controller isoperable to cause the lighting arrangement to illuminate the object inresponse to the object being less than a threshold distance from theUAV.5. A UAV according to any of clauses 1 to 4, wherein the controller isoperable to cause the lighting arrangement to illuminate the object inresponse to detecting a collision risk with the object.6. A UAV according to any of clauses 1 to 5, wherein the controller isoperable to cause the lighting arrangement to illuminate the object inanticipation of vertical take-off.7. A UAV according to any of clauses 1 to 6, wherein the controller isoperable to cause the lighting arrangement to illuminate the objectduring vertical take-off.8. A UAV according to clause 6 or 7, wherein the vertical take-off is anautonomous vertical take-off.9. A UAV according to any of clauses 1 to 8, wherein the controller isoperable to cause the lighting arrangement to illuminate the objectbased on data received from the object.10. A UAV according to any of clauses 1 to 9, wherein the controller isoperable to control the lighting arrangement autonomously.11. A UAV according to any of clauses 1 to 10, wherein the controller isoperable to control the lighting arrangement based on data received froma control device of a human operator of the UAV.12. A UAV according to any of clauses 1 to 11, wherein the UAV comprisesa power source and a motor, wherein the power source is arranged topower the motor, and wherein the power source is arranged to power thelighting arrangement.13. A UAV according to any of clauses 1 to 12, wherein the cameraarrangement and/or the lighting arrangement has a fixed orientation.14. A UAV according to any of clauses 1 to 12, wherein the cameraarrangement and/or the lighting arrangement has a dynamic orientation.15. A UAV according to clause 14, wherein the controller is operable toadjust the orientation of the camera arrangement and/or the lightingarrangement.16. A UAV according to clause 15, wherein the controller is operable toadjust the orientation of the camera arrangement and/or the lightingarrangement in-flight.17. An unmanned aerial vehicle, UAV, comprising:

a lighting arrangement; and

a controller operable to cause the lighting arrangement to illuminateairspace directly above the UAV in anticipation of and/or during anautonomous vertical take-off performed by the UAV.

18. An unmanned aerial vehicle, UAV, comprising an upwards-facinglighting arrangement controllable, while the UAV is in-flight, remotelyby a human operator of the UAV and/or autonomously by a controllercomprised in the UAV.19. An unmanned aerial vehicle, UAV, comprising a lighting arrangementarranged to illuminate an interior of the UAV and/or a cameraarrangement configurable to have a field of view including the interiorof the UAV.

What is claimed is:
 1. A drone, comprising: a controller configured tocontrol an upwards-facing lighting arrangement of the drone to emitflashing, visible light to illuminate airspace directly above the dronebased on data received from a control device of a human operator of thedrone.
 2. The drone of claim 1, wherein the upwards-facing lightingarrangement has a fixed orientation.
 3. The drone of claim 1, whereinthe upwards-facing lighting arrangement has a single upwards-facinglight source.
 4. The drone of claim 1, wherein the upwards-facinglighting arrangement comprises a light-emitting diode, LED.
 5. The droneof claim 1, wherein the drone comprises a power source and a motor, andwherein the power source is arranged to power both the upwards-facinglighting arrangement and the motor.
 6. The drone of claim 1, wherein thecontroller is configured to control the upwards-facing lightingarrangement to emit the flashing, visible light while the drone isin-flight.
 7. The drone of claim 1, wherein the received data comprisesan illumination request.
 8. The drone of claim 1, wherein the drone is aquadcopter.
 9. The drone of claim 1, comprising a further upwards-facingarrangement configured to capture electromagnetic radiation fromdirectly above the drone.
 10. The drone of claim 9, wherein the furtherupwards-facing arrangement is configured to capture infrared.
 11. Thedrone of claim 9, wherein the further upwards-facing arrangement isconfigured to capture visible light.
 12. The drone of claim 9, whereinthe further upwards-facing arrangement comprises a single camera. 13.The drone of claim 9, wherein the further upwards-facing arrangement hasa fixed orientation.
 14. The drone of claim 9, wherein the furtherupwards-facing arrangement has a dynamic orientation.
 15. The drone ofclaim 14, wherein the controller is configured to adjust the orientationof the further upwards-facing arrangement in-flight.
 16. A controldevice configured to control a drone, the drone comprising (a) anupwards-facing and/or downwards-facing lighting arrangement configuredto emit flashing, visible light and (b) a controller, wherein thecontrol device is configured to transmit data to the drone to cause thecontroller of the drone to control the upwards-facing and/ordownwards-facing lighting arrangement to emit the flashing, visiblelight based on the data transmitted from the control device of thedrone.
 17. A drone, comprising an interior-facing lighting arrangementarranged to illuminate an interior of a body of the drone and/or acamera arrangement configurable to have a field of view including theinterior of the body of the drone.